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LPSO-phase strengthening high-damping rare earth magnesium alloy and preparation method thereof

A rare-earth master alloy and rare-earth magnesium technology, which is applied in the field of LPSO phase-strengthened high-damping rare-earth magnesium alloy and its preparation, can solve the problems of poor corrosion resistance, limited application prospects, poor mechanical properties, and low damping performance, and achieve excellent comprehensive mechanics The effect of performance, wide application, and easy industrialization

Pending Publication Date: 2019-12-31
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently developed high-damping magnesium alloy systems include Mg-Zr, Mg-Ni and Mg-Cu-Mn systems, and most of them are cast magnesium alloys. Although they all have excellent damping properties, the damping value can reach more than 0.05. However, its mechanical properties are poor, and its tensile strength is only about 150MPa. For example, the damping internal friction value Q of Mg-3Cu-1Mn alloy -1 It can reach 0.1, but its tensile strength is only 149MPa
In addition, the poor corrosion resistance of Mg-Ni alloys limits its application prospects.
At present, the widely used AZ series magnesium alloy has high mechanical properties and good corrosion resistance, but its damping performance is nearly 10 times lower than that of other high damping magnesium alloys.

Method used

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  • LPSO-phase strengthening high-damping rare earth magnesium alloy and preparation method thereof
  • LPSO-phase strengthening high-damping rare earth magnesium alloy and preparation method thereof
  • LPSO-phase strengthening high-damping rare earth magnesium alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] This embodiment provides an LPSO phase-strengthened high-damping rare earth magnesium alloy. The raw material composition and weight percentage content are: rare earth elements: 2.7%, Zn: 0.8%, Mn: 0.5%, and the balance is Mg.

[0041] The rare earth elements in this embodiment include Y and Ce, the content of Y in the magnesium alloy is 2.2% by weight, and the content of Ce in the magnesium alloy is 0.5% by weight. Wherein the mass ratio of Y and Zn is 2.75.

[0042] The preparation method of the LPSO phase strengthened high damping rare earth magnesium alloy comprises the following steps:

[0043] Step 1: with pure magnesium ingot (more than 99.5wt%), pure Zn ingot (more than 99.5wt%), Mg-25Y master alloy (that is, the composition content of the master alloy is: 25wt% Y, the balance is Mg) and Mg- 20Ce master alloy and MnCl 2 Particles are raw materials, weighed and prepared according to the mass percentage of Y2.2wt%, Ce 0.5wt%, Zn 0.8wt%, Mn 0.5wt%, and the balanc...

Embodiment 2

[0047] This embodiment provides an LPSO phase-strengthened high-damping rare-earth magnesium alloy. The raw material composition and weight percentage content are: rare earth elements: 3.2%, Zn: 1.0%, Mn: 0.6%, and the balance is Mg.

[0048] The rare earth elements in this embodiment include Y and Ce, the content of Y in the magnesium alloy is 2.5% by weight, and the content of Ce in the magnesium alloy is 0.8% by weight. Wherein the mass ratio of Y and Zn is 2.5.

[0049] The preparation method of the LPSO phase strengthened high damping rare earth magnesium alloy comprises the following steps:

[0050] Step 1: with pure magnesium ingot (above 99.5wt%), pure Zn ingot (above 99.5wt%), Mg-25Y master alloy and Mg-20Ce master alloy and MnCl 2 Particles are raw materials, weighed and prepared according to the weight percentage of Y 2.5wt%, Ce 0.8wt%, Zn 1.0wt%, Mn0.6wt%, and the balance is Mg, and the total amount of raw materials is 1kg;

[0051] Step 2: Preheat and dry the pu...

Embodiment 3

[0054] This embodiment provides an LPSO phase-strengthened high-damping rare earth magnesium alloy. The raw material composition and weight percentage content are: rare earth elements: 3.8%, Zn: 1.2%, Mn: 1.0%, and the balance is Mg.

[0055] The rare earth elements in this embodiment include Y and Ce, the content of Y in the magnesium alloy is 2.8% by weight, and the content of Ce in the magnesium alloy is 1.0% by weight. Wherein the mass ratio of Y and Zn is about 2.33.

[0056] The preparation method of the LPSO phase strengthened high damping rare earth magnesium alloy comprises the following steps:

[0057] Step 1: with pure magnesium ingot (above 99.5wt%), pure Zn ingot (above 99.5wt%), Mg-25Y master alloy and Mg-20Ce master alloy and MnCl 2 Particles are used as raw materials, and the raw materials are weighed and prepared according to the weight percentage of Y 2.8wt%, Ce 1.0wt%, Zn 1.2wt%, Mn1.0wt%, and the balance is Mg. The total amount of raw materials is 1kg;

...

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Abstract

The invention discloses an LPSO-phase strengthening high-damping rare earth magnesium alloy and a preparation method thereof. The magnesium alloy comprises the following elements of, by weight percentage, 2.7-3.8% of rare earth elements, 0.8-1.5% of Zn, 0.5-1.0% of Mn, and the balance Mg. With the adoption of a special LPSO phase of the magnesium alloy, the LPSO phase can exert the effect of improving the comprehensive mechanical property of the alloy and improving the damping property of the alloy, and the high-toughness and high-damping rare earth magnesium alloy is obtained; and according to the preparation method of the LPSO-phase strengthening high-damping rare earth magnesium alloy, with the adoption of a semi-continuous casting technology, the high-mechanical-property and high-damping rare earth magnesium alloy with the tensile strength of 180 MPa or more, the elongation percentage of 10% or above and the damping value of 0.065 or more is obtained, the finished product rate of the magnesium alloy is high, the machining forming property is good, the industrialization is easy to achieve, and the preparation method can be widely applied into sound transmission equipment of a loudspeaker box, an earphone and the like.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal materials, and in particular relates to an LPSO phase-strengthened high-damping rare-earth magnesium alloy and a preparation method thereof. Background technique [0002] With the rapid development of modern science and technology, vibration and noise have become one of the three major public hazards. The development and application of damping materials is an important way to solve vibration failure and noise interference. As a new type of lightweight structural material, magnesium alloy has attracted more and more attention from experts, scholars and major enterprises. Magnesium alloy has the characteristics of low density, high specific strength and specific stiffness, easy recycling, low energy consumption and excellent shock absorption and noise resistance. When the strain amplitude is 10 -4 , the damping internal friction value Q of pure magnesium -1 It can reach 0.11. Lightweig...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C1/03C22C1/06
CPCC22C1/03C22C1/06C22C23/06
Inventor 房大庆张晓茹孙贵训江中浩丁向东孙军付伟
Owner XI AN JIAOTONG UNIV
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